diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1998-03-17 22:05:47 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 1998-03-17 22:05:47 +0000 |
| commit | 27cfca1ec98e91261b1a5355d10a8996464b63af (patch) | |
| tree | 8e895a53e372fa682b4c0a585b9377d67ed70d0e /Documentation/hayes-esp.txt | |
| parent | 6a76fb7214c477ccf6582bd79c5b4ccc4f9c41b1 (diff) | |
Look Ma' what I found on my harddisk ...
o New faster syscalls for 2.1.x, too
o Upgrade to 2.1.89.
Don't try to run this. It's flaky as hell. But feel free to debug ...
Diffstat (limited to 'Documentation/hayes-esp.txt')
| -rw-r--r-- | Documentation/hayes-esp.txt | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/Documentation/hayes-esp.txt b/Documentation/hayes-esp.txt index d0682999c..62a9c7451 100644 --- a/Documentation/hayes-esp.txt +++ b/Documentation/hayes-esp.txt @@ -1,14 +1,37 @@ -HAYES ESP DRIVER VERSION 1.6 +HAYES ESP DRIVER VERSION 2.0 + +A big thanks to the people at Hayes, especially Alan Adamson. Their support +has enabled me to provide enhancements to the driver. + +Please report your experiences with this driver to me (arobinso@nyx.net). I +am looking for both positive and negative feedback. + +*** IMPORTANT CHANGES FOR 2.0 *** +Support for PIO mode. Five situations will cause PIO mode to be used: +1) A multiport card is detected. PIO mode will always be used. (8 port cards +do not support DMA). +2) The DMA channel is set to an invalid value (anything other than 1 or 3). +3) The DMA buffer/channel could not be allocated. The port will revert to PIO +mode until it is reopened. +4) Less than 33 bytes need to be transferred to/from the FIFOs. PIO mode will +be used for that transfer only. +5) A port needs to do a DMA transfer and another port is already using the +DMA channel. PIO mode will be used for that transfer only. + +A patch for setserial (2.12) is included to allow the ESP enhanced mode +configuration to be viewed and changed. +*** + +This package contains the files needed to compile a module to support the Hayes +ESP card. The drivers are basically a modified version of the serial drivers. Features: - Uses the enhanced mode of the ESP card, allowing a wider range of interrupts and features than compatibilty mode -- Uses DMA to transfer data to and from the ESP's FIFOs, reducing CPU load +- Uses DMA and 16 bit PIO mode to transfer data to and from the ESP's FIFOs, + reducing CPU load - Supports primary and secondary ports -- Special version of setserial can be used to view/change the enhanced mode - configuration. The setserial patch is distributed with the standalone - driver distribution. See http://www.nyx.net/~arobinso for more information. To compile/install: @@ -47,7 +70,8 @@ be: insmod esp divisor=0,0,0,0,0,0,0x84,0 The dma= option can be used to set the DMA channel. The channel can be either -1 or 3. For example, to set the dma channel to 3, the insmod command would be: +1 or 3. Specifying any other value will force the driver to use PIO mode. +For example, to set the dma channel to 3, the insmod command would be: insmod esp dma=3 |